The species-area relationship of European Lumbricidae (Annelida, Oligochaeta)

Judas, Michael

doi:10.1007/bf00397874

Cited by 37 publications

(15 citation statements)

References 35 publications

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“…Overall, it can be concluded that 1) oribatid mite species richness increases from high latitudes towards warm temperate sites but not further towards the tropics, and 2) oribatid mite diversity has little relationship to area, except on very small islands. That species richness is not highest in tropical regions has already been found for other soil animal taxa, such as collembolans, earthworms and nematodes (Procter 1984, Judas 1988, Lavelle et al 1995, De Deyn and Van der Putten 2005). This overall pattern may be comprehensible for decomposer species, which vary little with plant species composition; however, many species do not live directly on dead organic matter, but on fungi and other living prey, in particular in the tropics (Illig et al 2005).…”

Section: Discussionmentioning

confidence: 64%

“…The latitude‐diversity gradient also may not apply to decomposer microorganisms, such as bacteria, fungi and single‐celled eukaryotes, since most of these easily‐dispersed taxa are cosmopolitan, and only active when an appropriate substrate is available (Kjoller and Struwe 1982, Finlay 2002, Neufeld and Mohn 2005). Interestingly, the latitude‐diversity gradient also appears not to exist in certain below‐ground metazoan taxa, such as collembolans, mites, earthworms and nematodes (Judas 1988, Foissner 1997, Boag and Yeates 1998, Wardle 2002, Groombridge and Jenkins 2002, De Deyn and Van der Putten 2005). However, the data base is poor and conclusions therefore need to be drawn with care (Wardle 2002, De Deyn and Van der Putten 2005).…”

Section: Discussionmentioning

confidence: 99%

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Awesome or ordinary? Global diversity patterns of oribatid mites

Maraun

Schatz²,

Scheu³

2007

Ecography

115

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Diversity of most above-ground organisms increases with decreasing latitude, but the biogeographical and macroecological diversity patterns of below-ground animals have been poorly studied. We investigated the latitudinal diversity gradient in a primarily below-ground living soil taxon, oribatid mites. Furthermore, oribatid mite species richness from islands and mainlainds was tested for correlation with the size of the respective area (island or mainland) to evaluate if their species Áarea relationships are similar to those of above-ground taxa. The results suggest that for oribatid mites 1) diversity increases from the boreal to the warm temperate region but not further to the tropics, and 2) species Áarea relationships for islands and mainlands are similar to those of aboveground taxa, but this is mainly caused by very small islands, such as Cocos islands, and very large islands, such as Madagascar. When these islands are excluded the species Áarea relationship strongly differs from those of typical islands. The results support the view that below-ground animal taxa are generalists that inhabit wide niches. Most small islands have relatively rich oribatid mite faunas, supporting the observation that a large number of species can coexist in a small area (high a-diversity).

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Section: Discussionmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Awesome or ordinary? Global diversity patterns of oribatid mites

Maraun

Schatz²,

Scheu³

2007

Ecography

115

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“… Relationships between geographical area and species richness for (a) oribatid mites on mainlands (, R 2 = 0.40) and islands (○, R 2 = 0.56; after Maraun et al. , 2007) and (b) European earthworms ( R 2 = 0.76; after Judas, 1988). …”

Section: Global and Landscape Patterns Of Soil Biodiversity Distributionmentioning

confidence: 99%

Macroecological patterns in soil communities

Decaëns

2010

Global Ecology and Biogeography

392

294

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Aim To review published evidence regarding the factors that influence the geographic variation in diversity of soil organisms at different spatial scales. Location Global.Methods A search of the relevant literature was conducted using the Web of Science and the author's personal scientific database as the major sources. Special attention was paid to include seminal studies, highly cited papers and/or studies highlighting novel results.Results Despite their significant contribution to global biodiversity, our taxonomic knowledge of soil biota is still poor compared with that of most aboveground organisms. This is particularly evident for small-bodied taxa. Global patterns of soil biodiversity distribution have been poorly documented and are thought to differ significantly from what is reported above-ground. Based on existing data, it appears that microorganisms do not respond to large-scale environmental gradients in the same way as metazoans. Whereas soil microflora seem to be mainly represented by cosmopolitan species, soil animals respond to altitudinal, latitudinal or area gradients in the same way as described for above-ground organisms. At local scales, there is less evidence that local factors regulate above-and below-ground communities in the same way. Except for a few taxa, the humpbacked response to stress and disturbance gradients doesn't seem to apply underground. Soil communities thus appear weakly structured by competition, although competitive constraints may account for assembly rules within specific taxa. The main factor constraining local soil biodiversity is the compact and heterogeneous nature of soils, which provides unrivalled potential for niche partitioning, thus allowing high levels of local biodiversity. This heterogeneity is increased by the impact of ecosystem engineers that generate resource patchiness at a range of spatio-temporal scales.

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“…Diversity patterns of belowground animals have been poorly studied (Maraun et al 2007). Yet, there are several indications that species richness is not highest in tropical regions for soil animal taxa, such as nematodes (Procter 1984), earthworms (Judas 1988, Lavelle et al 1995 and oribatid mites (Maraun et al 2007). However, observed richness and survey effort are highly correlated (Hortal et al 2007).…”

Section: Oligochaete Group Number Of Species Referencementioning

confidence: 99%

Continental biodiversity of South American oligochaetes: The importance of inventories.

Christoffersen

2010

AZM

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Christoffersen, M. L. 2010. Continental biodiversity of South American oligochaetes: The importance of inventories. Acta Zoológica Mexicana (n.s.), Número Especial 2: 35-46. ABSTRACT. A reevaluation of South American oligochaetes produced 871 known species. Megadrile earthworms have rates of endemism around 90% in South America, while Enchytraeidae have less than 75% endemism, and aquatic oligochaetes have less than 40% endemic taxa in South America. Glossoscolecid species number 429 species in South America alone, a full two-thirds of the known megadrile earthworms. More than half of the South American taxa of Oligochaeta (424) occur in Brazil, being followed by Argentina (208 taxa), Ecuador (163 taxa), and Colombia (142 taxa). Present diversity counts of Oligochaeta are still substantially underscored. Surveys of Enchytraeidae in native forests in São Paulo 30 years ago produced a 100% yield of new species, while this group is still unregistered in the whole northeast region of Brazil. There is clearly much basic research to be done on oligochaetes in South America. Key words: Faunistics, inventory, megadriles, microdriles, neotropics.Christoffersen, M. L. 2010. La biodiversidad continental de los oligoquetos en Sudamérica: la importancia de los inventarios. Acta Zoológica Mexicana (n.s.), Número Especial 2: 35-46. RESUMEN. Una nueva evaluación de los oligoquetos sudamericanos tuvo como resultado 871 especies. Lombrices megadriles tienen un endemismo de alrededor de 90%, en cuanto Enchytraeidae tiene menos de 75% de endemismo, y los microdilos acuáticos tienen menos de 40% de los taxa endémicos en América del Sur. Los Glossoscolecídeos representan 429 especies solamente en América del Sul, constituyendo dos tercios de los megadriles conocidos en este continente. Más de la mitad de los taxa sudamericanos de Oligochaeta (424) se encuentran en el Brasil, seguido de la Argentina (292 taxa), Ecuador (163 taxa), y Colombia (142 taxa). Cómputos actuales de los oligoquetos son todavía significativamente subestimados. Los muestreos de Enchytraeidae en los bosques nativos de San Pablo realizados hace 30 años resultaron en 100% de especies endémicas. En cuanto este grupo todavía no fue muestreado en toda la región Nordeste del Brasil. Es claro que falta mucha investigación básica por hacer en lo que se refiere a los Oligoquetos de América del Sur.

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The species-area relationship of European Lumbricidae (Annelida, Oligochaeta)

Abstract: Studies throughout Europe reporting species lists of lumbricid earthworms and ranging from 100 m to >500000 km are analysed for the regression of species number S on size of area A [km]. This species-area relation is described by: S=7.9*A (r=0.76).

Cited by 37 publications

References 35 publications

Awesome or ordinary? Global diversity patterns of oribatid mites

Awesome or ordinary? Global diversity patterns of oribatid mites

Macroecological patterns in soil communities

Continental biodiversity of South American oligochaetes: The importance of inventories.

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